IGHE and seasonal allergic rhinitis: Predictors of aeroallergen-specific serum IgE included male sex (OR = 1.77; p = 0.023), parental hay fever (OR = 1.95; p = 0.010), history of recurrent colds (OR = 2.27; p = 0.003), number of siblings (OR for each additional sibling = 1.29; p = 0.009), the use of household chlorine bleach (OR = 0.47; p = 0.003), and birth weight (OR for each additional 100 g = 0.94; p = 0.012).